Worldwide Half Marathon Calendar – Manually Vetted Races | HalfMarathon.net 2,431 events | HalfMarathon.net

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Jun

06

2026

Seattle, Washington (United States of America) - "Run for Breast Cancer 5K / 10K / 13.1 Seattle". Join the Fight: Breast Cancer Run! Together, we can raise awareness and funds to support those affected by breast cancer. Enjoy a spirited day filled with community, inspiration, and hope. Let's unite for a cause that touches us all and run for a future without breast cancer! Sign up now and help us make a lasting impact! https://runsignup.com/Race/WA/Seattle/RunForBreastCancer5K10KSEATTLE606?aflt_token=Nktw0AUB3nF4FPeh7Y7AWqQewFdw9sGt

Jun

20

2026

Seattle, Washington (United States of America) - "Run Juneteenth Day 5K / 10K / 13.1 Seattle". On Juneteenth, we remember resilience, honor progress, and run toward a brighter future. Join the Juneteenth Day Run - an event that celebrates freedom, community, and the unbreakable human spirit. Let's make every mile matter. https://runsignup.com/Race/WA/Seattle/RunJuneteenthDay5K10KSEATTLE?aflt_token=Nktw0AUB3nF4FPeh7Y7AWqQewFdw9sGt

Jul

18

2026

Olympia, Washington (United States of America) - "Olympia Lakefair Races". 2026 marks the 50th Anniversary of the Olympia Lakefair Races - 3K, 8K and Jerry Miller Half Marathon. Join us and make Olympia your center for a Pacific Northwest vacation and adventure in July 2026! All three races start and finish on 5th Ave along Heritage Park at 7 a.m. (Half Marathon), 8 a.m. (8K), and 8:05 a.m. (3K). The 3K race is free for participants 14 years and younger. There are prizes for M/F Overall, Masters (40+), Super masters (50+), and top three 5-year age group winners up age 90+ in each race. Additionally, several random prizes are awarded, and post-race food and snacks are provided. Soft 60/40 Cotton blend T-shirts are included with entries ($10 extra for free 14 & under 3K participants), and Jerry Miller Half Marathon finishers receive a finisher medal. Free downloadable and shareable photos listed by participant and results are posted on the website. We welcome runners and walkers of all ages and abilities and have multiple age, wheelchair, and disabled divisions and awards. All courses are USATF certified. The Olympia Lakefair Races (3K, 8K, and Jerry Miller Half Marathon) are organized by the Lake Run Organization, a 501(c)3 nonprofit organization, and the Olympia Downtown Rotary Club. The primary purpose of the races is to raise money for local public high school cross country and track & field programs and local Rotary youth scholarships and grants. www.olympialakefairraces.org

Sep

07

2026

Redmond, Washington (United States of America) - "Redmond Harvest Half Marathon". Harvest the fruits of your training at the Redmond Harvest Half Marathon, to be held Labor Day Monday (September 7, 2026)! Starting from Redmond's Marymoor Park, the Harvest Half is a fast, flat out-and-back half-marathon that goes west out of Marymoor Park and north on the Sammamish River Trail before returning to the start. Whether this is your first half-marathon, or you are experienced with this distance, this 13.1-mile course will give you an opportunity for your running goals to come to fruition. Come support a local race put on by Lake Sammamish Run Club and Seattle United Runners and finish your summer with a bang. www.redmondharvesthalf.com



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